noun, plural plan·e·tar·i·ums, plan·e·tar·i·a [plan-i-tair-ee-uh] /ˌplæn ɪˈtɛər i ə/.
Origin of planetarium
Examples from the Web for planetarium
Historical Examples of planetarium
The planets are visible during the day in the planetarium as well as night.
Ingulfus mentions at the same time a nadir, as he calls it, or planetarium, executed in various metals.
In the school-room there was a planetarium, very neatly finished, set in motion by clock-work.Travels Through North America, v. 1-2
Berhard Saxe-Weimar Eisenach
The dome was lighted to represent a clear night, and, incidentally, all nights are clear in a planetarium.
noun plural -iums or -ia (-ɪə)
1734, "orrery," Modern Latin, from Late Latin planeta (see planet) + Latin -arium "a place for." Sense of "device for projecting the night sky onto the interior of a dome" is attested from 1929.